Submission #1443263

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Source Code Expand

#include "bits/stdc++.h"
#define MOD 1000000007
#define INF 11234567890
#define in std::cin
#define out std::cout
#define rep(i,N) for(int i=0;i<N;++i)
typedef long long int LL;

LL N, P, A[51];
LL cou[2];

int main()
{
	in >> N >> P;
	rep(i, N) { in >> A[i]; }

	rep(i, N) { ++cou[A[i] % 2]; }
	
	if (cou[1]) { out << (1 << (N - 1)) << std::endl; }
	else { out << (P ? 0 : (1 << N)) << std::endl; }
	return 0;
}

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